https://www.theregister.co.uk/2019/06/24/raspberry_pi_4_model_b/

The Raspberry Pi Foundation has multiplied 3 by 3 and come up with 4: today a new Pi, the Raspberry Pi 4, officially launches with three times the grunt of the previous generation, the Raspberry Pi 3.

The diminutive Raspberry Pi computer has enjoyed a number of updates since the original went on sale in 2012. The $35 Model B machine, which debuted with 256MB RAM and a single 700MHz Arm-compatible CPU core in a Broadcom system-on-chip, has seen RAM and CPU horsepower inch upwards, to the 1GB and 1.4GHz of last year's Raspberry Pi 3 Model B+.